Fire-resistant fiber roofing tile



July 20 1926. v 1,593,071

R. J. GRUENBERG FIRE RESISTANT FIBER ROOFING TILE Filed Nov. 24, 1923INVENTOR.

1B :7. Quenig BY MM 0 .TTORNET.

Patented July 20, 1926.

UNITED STATES PATENT OFFICE RAOUL J'. GRUENBERG, OF SAN FRANCISCO,CALIFORNIA.

FIRE-RESISTANT FIBER ROOFING TILE.

Application filed November 24, 1923.

This invention relates to a fire resistant roof tile and it and strongtile like the ordinary s object is to produce a light which will looksubstantially fired tile without its 5 weight and with equal durabilityand waterproof qualities.

Another object of the invention is duc a tile which Will be initially soa to avoid any to proformed tendency to flatten out after it has beenplaced in position on the root.

In attaining fibrous materia these objects a tire resistant l of therequired lightness is found in rice hulls which form the base of thetile produced. These hulls are very light and contain about 18% ashwhich makes them 'burn' with great difliculty.

Other objects of the invention will appear as the description proceeds.

An embodim 1n the accompa same reference numeral ent of the invention isshown nying drawings in which the is applied to the same portionthroughout, but I am aware that there may be modifications thereof.

Fig. l is a perspective view of of tile,

Fig. 2 is a one form perspective view of another form of tile produced.

The numeral 1 indicates a half round tile which is a common formproduced, while 2 indicates the convex sidand 3 the concave side of anS-shaped tile which may be used instead of the shape shown in Fig. 1.

The tile consists of a mixture of asphalt, rice hulls fibrous materialand mineral matter all thoroughly mixed and formed into the shapesdesired.

After being formed, to a pressure of several square inch to the tilesare subject hundred pounds per properly solidify the mass,

and after such pressure has been applied they are ready dry as the caseto be piled up to cool or to may be, but in any event the Serial No.676,851.

forming initially brings the material to the shape indicated hardenedthere is so that when completely no tendency for the tiles to flattenout.

The fibrous materials used may be paper fiber, asbestos fiber or mineralwool and a filling of added, but

broken stone or brick may be the rice hulls and asphalt must alwavs bein sufiicient quantity to give the other materials going into theproduct the necessary adhesion and lightness to make an acceptableproduct.

The particular materials product are specifically claimed in plicationfor patent serial number forming this an ap- 676,850

filed of even date herewith, and are not claimed herein. The tiles mayalso be formed in an ordinary clay tile machine it great pressure isappiied thereto.

lVhat I claim is as follows, but modifications may be made in carryingout the invention shown in the drawings and in the above particularlydescribed form thereof,

within the fined I claim purview of the invention, as deby the annexedclaims.

of asphalt,

rice hulls, fibrous material and mineral matter, moulded under heavypressure to form a tile.

In testimony whereof I have hereunto set my hand this 14th ,day ofNovember A. D.,

RAOUL J. GRUENBERG.

